This video produced by Sylvain Hunter on YouTube serves as an introductory explanation on what DanceDanceRevolution and related dance games are like in this day and age. It goes over not only DanceDanceRevolution, but what the current StepMania communities are like now and the type of content they typically play.
[DDR A20 PLUS] New Licensed Track Update 6/21
A new licensed track will be added to DDR A20 PLUS on June 21, 2021 @ 10:00 JST: 「恋 / 星野 源」 (This update is not available for North American versions of DDR A20 PLUS.)